Sticking gas pedal, It's like driving with cruise control Options

[EJP914]

Have 1.8 with sgl carb. Backing off the gas, the pedal will not completely release. There is about a 1/2" of travel before it completely comes to rest and the engine returns to idle speed. I have to pull it back with my foot to get it all the way back.
I have replaced the accel pedal (old one all rusty inside) and put in a new accel cable thinking the old one is was all gunked up. Neither of these helped. The accelerator action is just not very smooth and the gas pedal still hangs up.
What else can I check?
I have sprayed the accel pedal bushings with PBBlaster thinking that may loosen things up, but no luck.
If I replace these 2 bushings, can it be done with the pedal cluster in the car?
It doesnt look too bad looking at the Haynes manual. Take out the cotter pin on the end and the pedal pivot should come right out? And then take out the 2 bushings?
This is very frustrating and I am losing good driving days. Your help is very much appreciated.
Ed

[pilothyer]

See how free the throttle on that single carb is without the cable and also check the cable and pedal while the cable is disconnected from the carb....this might help to isolate the problem.